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package Getopt::Std;
require 5.000;
require Exporter;
=head1 NAME
getopt - Process single-character switches with switch clustering
getopts - Process single-character switches with switch clustering
=head1 SYNOPSIS
use Getopt::Std;
getopt('oDI'); # -o, -D & -I take arg. Sets opt_* as a side effect.
getopt('oDI', \%opts); # -o, -D & -I take arg. Values in %opts
getopts('oif:'); # -o & -i are boolean flags, -f takes an argument
# Sets opt_* as a side effect.
getopts('oif:', \%opts); # options as above. Values in %opts
=head1 DESCRIPTION
The getopt() functions processes single-character switches with switch
clustering. Pass one argument which is a string containing all switches
that take an argument. For each switch found, sets $opt_x (where x is the
switch name) to the value of the argument, or 1 if no argument. Switches
which take an argument don't care whether there is a space between the
switch and the argument.
Note that, if your code is running under the recommended C<use strict
'vars'> pragma, you will need to declare these package variables
with "our":
our($opt_foo, $opt_bar);
For those of you who don't like additional global variables being created, getopt()
and getopts() will also accept a hash reference as an optional second argument.
Hash keys will be x (where x is the switch name) with key values the value of
the argument or 1 if no argument is specified.
To allow programs to process arguments that look like switches, but aren't,
both functions will stop processing switches when they see the argument
C<-->. The C<--> will be removed from @ARGV.
=cut
@ISA = qw(Exporter);
@EXPORT = qw(getopt getopts);
$VERSION = '1.02';
# Process single-character switches with switch clustering. Pass one argument
# which is a string containing all switches that take an argument. For each
# switch found, sets $opt_x (where x is the switch name) to the value of the
# argument, or 1 if no argument. Switches which take an argument don't care
# whether there is a space between the switch and the argument.
# Usage:
# getopt('oDI'); # -o, -D & -I take arg. Sets opt_* as a side effect.
sub getopt ($;$) {
local($argumentative, $hash) = @_;
local($_,$first,$rest);
local @EXPORT;
while (@ARGV && ($_ = $ARGV[0]) =~ /^-(.)(.*)/) {
($first,$rest) = ($1,$2);
if (/^--$/) { # early exit if --
shift @ARGV;
last;
}
if (index($argumentative,$first) >= 0) {
if ($rest ne '') {
shift(@ARGV);
}
else {
shift(@ARGV);
$rest = shift(@ARGV);
}
if (ref $hash) {
$$hash{$first} = $rest;
}
else {
${"opt_$first"} = $rest;
push( @EXPORT, "\$opt_$first" );
}
}
else {
if (ref $hash) {
$$hash{$first} = 1;
}
else {
${"opt_$first"} = 1;
push( @EXPORT, "\$opt_$first" );
}
if ($rest ne '') {
$ARGV[0] = "-$rest";
}
else {
shift(@ARGV);
}
}
}
unless (ref $hash) {
local $Exporter::ExportLevel = 1;
import Getopt::Std;
}
}
# Usage:
# getopts('a:bc'); # -a takes arg. -b & -c not. Sets opt_* as a
# # side effect.
sub getopts ($;$) {
local($argumentative, $hash) = @_;
local(@args,$_,$first,$rest);
local($errs) = 0;
local @EXPORT;
@args = split( / */, $argumentative );
while(@ARGV && ($_ = $ARGV[0]) =~ /^-(.)(.*)/) {
($first,$rest) = ($1,$2);
if (/^--$/) { # early exit if --
shift @ARGV;
last;
}
$pos = index($argumentative,$first);
if ($pos >= 0) {
if (defined($args[$pos+1]) and ($args[$pos+1] eq ':')) {
shift(@ARGV);
if ($rest eq '') {
++$errs unless @ARGV;
$rest = shift(@ARGV);
}
if (ref $hash) {
$$hash{$first} = $rest;
}
else {
${"opt_$first"} = $rest;
push( @EXPORT, "\$opt_$first" );
}
}
else {
if (ref $hash) {
$$hash{$first} = 1;
}
else {
${"opt_$first"} = 1;
push( @EXPORT, "\$opt_$first" );
}
if ($rest eq '') {
shift(@ARGV);
}
else {
$ARGV[0] = "-$rest";
}
}
}
else {
warn "Unknown option: $first\n";
++$errs;
if ($rest ne '') {
$ARGV[0] = "-$rest";
}
else {
shift(@ARGV);
}
}
}
unless (ref $hash) {
local $Exporter::ExportLevel = 1;
import Getopt::Std;
}
$errs == 0;
}
1;
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